{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:46.921474", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2023-Apr-01_to_2023-Apr-03_46.0_25.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2023040000097}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "April 01 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 03 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 92403.89706733478}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Saudi Arabia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 25.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 46.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 44.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.47, 25.03], [45.0, 25.25], [45.25, 25.15], [45.38, 25.2], [45.32, 25.32], [44.97, 25.47], [44.75, 26.0], [44.97, 26.53], [45.5, 26.75], [45.75, 26.65], [46.0, 26.75], [46.25, 26.65], [46.5, 26.75], [46.75, 26.65], [47.0, 26.75], [47.5, 26.54], [47.82, 26.68], [47.97, 27.03], [48.5, 27.25], [48.75, 27.15], [49.0, 27.25], [49.53, 27.03], [49.75, 26.5], [49.65, 26.25], [49.75, 26.0], [49.65, 25.75], [49.75, 25.5], [49.53, 24.97], [49.18, 24.82], [49.03, 24.47], [48.68, 24.32], [48.53, 23.97], [48.18, 23.82], [48.03, 23.47], [47.68, 23.32], [47.53, 22.97], [47.0, 22.75], [46.47, 22.97], [46.32, 23.32], [46.25, 23.35], [46.0, 23.25], [45.75, 23.35], [45.68, 23.32], [45.53, 22.97], [45.0, 22.75], [44.47, 22.97], [44.25, 23.5], [44.46, 24.0], [44.25, 24.5], [44.47, 25.03]]]]}, "2023-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.47, 25.03], [45.0, 25.25], [45.25, 25.15], [45.38, 25.2], [45.32, 25.32], [44.97, 25.47], [44.75, 26.0], [44.97, 26.53], [45.5, 26.75], [45.75, 26.65], [46.0, 26.75], [46.25, 26.65], [46.5, 26.75], [46.75, 26.65], [47.0, 26.75], [47.5, 26.54], [47.82, 26.68], [47.97, 27.03], [48.5, 27.25], [48.75, 27.15], [49.0, 27.25], [49.53, 27.03], [49.75, 26.5], [49.65, 26.25], [49.75, 26.0], [49.65, 25.75], [49.75, 25.5], [49.53, 24.97], [49.18, 24.82], [49.03, 24.47], [48.68, 24.32], [48.53, 23.97], [48.18, 23.82], [48.03, 23.47], [47.68, 23.32], [47.53, 22.97], [47.0, 22.75], [46.47, 22.97], [46.32, 23.32], [46.25, 23.35], [46.0, 23.25], [45.75, 23.35], [45.68, 23.32], [45.53, 22.97], [45.0, 22.75], [44.47, 22.97], [44.25, 23.5], [44.46, 24.0], [44.25, 24.5], [44.47, 25.03]]]]}, "2023-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.47, 25.03], [45.0, 25.25], [45.25, 25.15], [45.38, 25.2], [45.32, 25.32], [44.97, 25.47], [44.75, 26.0], [44.97, 26.53], [45.5, 26.75], [45.75, 26.65], [46.0, 26.75], [46.25, 26.65], [46.5, 26.75], [46.75, 26.65], [47.0, 26.75], [47.5, 26.54], [47.82, 26.68], [47.97, 27.03], [48.5, 27.25], [48.75, 27.15], [49.0, 27.25], [49.53, 27.03], [49.75, 26.5], [49.65, 26.25], [49.75, 26.0], [49.65, 25.75], [49.75, 25.5], [49.53, 24.97], [49.18, 24.82], [49.03, 24.47], [48.68, 24.32], [48.53, 23.97], [48.18, 23.82], [48.03, 23.47], [47.68, 23.32], [47.53, 22.97], [47.0, 22.75], [46.47, 22.97], [46.32, 23.32], [46.25, 23.35], [46.0, 23.25], [45.75, 23.35], [45.68, 23.32], [45.53, 22.97], [45.0, 22.75], [44.47, 22.97], [44.25, 23.5], [44.46, 24.0], [44.25, 24.5], [44.47, 25.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.034518757318153}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.646697357924401}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.69010855593268, 17.701637278920998, 19.55647216542752]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.831703099924653, 16.364664565281885, 18.474891250305575]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.3298070975110035, -6.5778300303817225, -5.0324549458804695]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.248921792192675, -7.034518757318153, -5.715669527744524]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6193914275082637, -2.00780251009271, -1.5295097227102377]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8205895866867303, -2.158281176115582, -1.7394343599784485]}}